Key blank



FIG. 1 is a perspective view of a key blank showing my new design;

FIG. 2 is a left side elevation view thereof, the right side elevation view thereof being the same thereof;

FIG. 3 is a to plan view thereof, the bottom plan view thereof being the same thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof. 

CLAIM The ornamental design for a key blank, as shown and described. 